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Erathem | System | Series | Group | Thickness (m) | Lithology |
Western Simao Basin | Eastern Simao Basin |
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Cenozoic | Quaternary | Holocene | Holocene | - | Lacustrine deposit |
Pleistocene | Pleistocene | - |
Neogene | Pliocene | Fudong | 60-350 | Lacustrine grey clay rock, lignite with conglomerate |
Miocene | Sanhaogou | >1391 | Light grey mudstone and sandstone |
Paleogene | Oligocene | Mengla | 529-1593 | Purple grey conglomerate interbedded with pebbly feldspar sandstone and feldspathic quartz sandstone |
Eocene | Denghei | 169-1908 | Aubergine calcareous and argillaceous siltstone unequally interbedded with tawny fine sandstone |
Paleocene | Mengyejing | 21-1191 | Salt-bearing gompholite, halite with thin sylvite and anhydrite in the lower part; variegated gompholite interlayered with thin layers of mudstone and anhydrite in the middle part; red-brown siltstone and mudstone with fine sandstone, marlstone, and grey gypsum in the upper part |
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Mesozoic | Cretaceous | Upper | Mankuanhe | >3000 | Red argillaceous siltstone interbedded with calcareous silty mudstone |
Lower | Bashahe | 28-213 | Grey quartz sandstone, siltstone, and mudstone in the lower part; red sandstone with siltstone and mudstone in the middle part; grey-purple and grey-purple fine-grained quartz sandstone in the upper part |
Mangang | 1381-1961 |
Jingxing | 304-1328 |
Jurassic | Upper | Bazhulu | 0-894 | Red calcareous mudstone and silty mudstone |
Middle | Hepingxiang | 277-2398 | Red mudstone and siltstone in the lower part, variegated mudstone in the upper part, and coquina marlstone with karst gompholite and gypsum at the top |
Lower | Zhangkezhai | Yangjiang | 63-2039 | Red mudstone, silty mudstone with gypsum |
Triassic | Upper | Dapingzhang | Zhama | 400-711 | Red sandstone and grey limestone and shale in the lower part, black-grey silty mudstone and mudstone in the middle part, and green-yellow volcaniclastic rock and grey siltstone and silty mudstone in the upper part |
Luma | 155-750 |
Weiyuanjiang | Yiwanshui | 240-1350 |
Middle | Choushui | Niushang | 639-1870 | Grey lamellar limestone and yellow siltstone, mudstone, and sandy sericite slate with grey cryptocrystalline limestone |
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Paleozoic | Permian | Upper | Shifodong | 0-1147 | Dark grey limestone, mudstone, siltstone, lithic sandstone, and greyish yellow sandshale, siliceous rock, tuff, andesite with coal |
Laogongzhai | Yangbazhai | 268-3869 |
Lower | Upper Daxinshan | Damingshan | 31-1815 | Grey limestone, sericite phyllite, killas, lithic sandstone, and basalt |
Lower Daxinshan | Caobashantou | 38-2250 |
Carboniferous | Upper | Ximenyazi | Absent | 89-1541 | Carbonate rock |
Middle | Middle | >458 | Limestone |
Lower | Manbing | >349 | Limestone, mudstone, silty shale, tuff, and feldspar lithic sandstone |
Devonian | Lower | Absent | Longbie | 100 | Marlstone, diatomite with shale in the lower part; grey quartz sandstone interbedded with shale with siltstone in the middle part; and grey thin layers of marlstone, mudstone, and siltstone in the upper part |
Dazhongzhai | >561 |
Luojiang | 159 |
Silurian | Upper | Upper | - | Siliceous rock and black shale |
Middle | Middle | >1000 | Black-grey quartz sandstone and siltstone |
Lower | Lower | 551-1156 | Greyish green silty slate interbedded with quartz sandstone |
Ordovician | | | >20000 | Clastic rock with limestone |
Cambrian | | Wuliangshan | >1544 | Quartzite, schist, phyllite, and metasandstone |
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Proterozoic | | | Lancang | Ailaoshan | 4108-6306 | The Ailaoshan group is composed of gneiss, granulite, schist, migmatite, and marble; the Lancang group, of various types of schist, metabasic lava, and banded siderite and magnetite |
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